Stove board



Patented May 7, 1940 "silovE BOARD Stanley F. Jackes, St. Louis, Mo., assigner` to Jaokes-Evans Manufacturing Company, St.l

Louis, Mo., a corporation of Missouri Application January 2l, 1938, Serial No. 186,106

2 Claims.

This invention relates to stove boards, and with regard to certain more specic features, to sheet-insulating stove boards.

Among the several objects of the invention may be noted the provision of -stove boards which vare effectively heat-insulating so that they effectively protect the floors upon which they rest; and the provision of a stove board of this class which is easy to fabricate rigidly from inherently flexible or bendab-le sheet metal and which may be sold at a low price. Other objects will be in part obvious and in part pointed out hereinafter. i

The invention accordingly comprises the elements and combinations of elements, features of construction, and arrangements of parts which.

will be exemplified in the structures hereinafterv described, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawing, in which is illustrated one of various possible embodiments of the invention,

Fig. 1 is a perspective view showing the top of my new board;

Fig. 2 is a View similar to Fig. 1, but showing the bottom of the board;

Fig. 3 is a vertical section taken on line 3-3 of Fig. 1; and,

Fig. 4 is a vertical section taken on line 4--4 g() 0f Fig. 1.

Similar reference characters indicate corresponding parts throughout the several views of the drawing.

Stove boards of the class herein referred to are made for supporting stoves, and have for their purpose the protection of the floor therebeneath. The protection is against scorching by radiation from the stove, dropping of hot ashes, and the like. yPreviously, stove boards have been made, o sometimes merely out of metal. These have not i been very effective, because metal is a good transmitter of heat.

Some metal stove-boards have previously been edges of which the edges of sheet metal I are clinched as at 5. The clinch is formed by an elevated portion 'l which serves notl only decoratively to set oil the edge of the top I, but prevents the direct transmission of edge blows 5 against the board 3. Corner cleats are shown at numerals 9, but it is to be understood that these may be dispensed with and form no new part if this invention.

The normally at gypsum wall-board 3 com- 10 prises a central gypsum or like, inherently rigid monolithic layer II above which is an venclosing layer of cardboard I3, and below which is another enclosing layer of cardboard I5. The cardboard layers I3 and I5 serve to contain the fran'- 15 gible gypsum layer and are solidly adheredthereto'thus making a preformed normally flat insulating structure. The wall board remains substantially flat during the use for which it is herein indicated, and prevents the inherently bend- 20 able or exible sheet metal from deviating downward from its normally flat condition. n

The gypsum Il is reproof, and it will be understood that any oth-er similar fireproof plastic material which will become monolithic may be 25 used. As is known, the gypsum is plastic when wet and dries into a monolithic frangible mass when dry, the containing layers I3 and I5 adhering thereto.

The nature of the paper layers is fibrous, andy this fact accounts for improved strength in the monolithic gypsum layer. It also strengthens the frangible gypsum against breakage, and holds 7 together various sections of it, even if it should crack. The upper layer cushions against local '3 deflections that may occur in the sheet metal I.

The term Wall board is used herein as meaning a normally flat sheetv of material of rigid enough construction to forma wall-like structure. It is of the type wherein the monolithic layer between the fibrous layers is adhered to the latter to form an organized, unitary and llat structure.

The term plaster board herein means a board whose rigidity depends upon a layer of a sub1- stance which is plastic when wet anda hard and normally flat monolith When dry.

It will be noted that, except for the clinching portions 5, the metal layer I and the board 3 are unattached. They remain coplanar because of their normally at characteristics.

In View of the above, it will be seen thaty the several objects of the invention are achieved and other advantageous results attained.

As many changes could be made in carrying out the above constructions without departing 55 from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

I claim:

1. A stove board comprising a top layer of normally flat but inherently bendable sheet metal, a bottom layer comprising an initially separate, rigid and Hat plaster board, said board comprising as a preformed unitary organization a at monolithic layer of a frangible plaster-like substance such as gypsum, a cardboard-like protect-v ing layer attached to said plaster-like layer and located between it and said top metal layer, and a cardboard-like layer attached to said plasterlike substance and. located below the same,` the edges of said sheet metal being clinched over the edges of said plaster board, the two cardboardlike levers protecting the relatively frangible plaster-like layer against breakage at the clinch and against breakage by local deections in the top layer and holding together any separate portions of the plaster-like layer should it crack.

2. A stove board comprising a top layer` of normally at but inherently bendable sheet metal, a bottom layer comprising an initially separate, rigid and flat plaster board, said board comprising as a preformed unitary organization a at monolithic layer of a frangible plaster-like substance such as gypsum, a cardboard-like pro-tecting layer attached to said plaster-like layer and located between it and said top metal layer, the cardboard-like layer protecting the relatively frangible plaster-like layer against breakage byl local'deflections in the top layer.

STANLEY F. J ACKE'S. 

